1645422210049 has 2 divisors, whose sum is σ = 1645422210050. Its totient is φ = 1645422210048.

The previous prime is 1645422210037. The next prime is 1645422210101. The reversal of 1645422210049 is 9400122245461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1521292827649 + 124129382400 = 1233407^2 + 352320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645422210049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1645422209993 and 1645422210020.

It is not a weakly prime, because it can be changed into another prime (1645422220049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822711105024 + 822711105025.

It is an arithmetic number, because the mean of its divisors is an integer number (822711105025).

Almost surely, 2^{1645422210049} is an apocalyptic number.

It is an amenable number.

1645422210049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645422210049 is an equidigital number, since it uses as much as digits as its factorization.

1645422210049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 1645422210049 in words is "one trillion, six hundred forty-five billion, four hundred twenty-two million, two hundred ten thousand, forty-nine".